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Finding the Fourth Proportional to 15,507, 21,399.66 and 8,792.76

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Solution

The fourth proportional to 15,507, 21,399.66 and 8,792.76 is: 12,134.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507 : 21,399.66 = 8,792.76 : x
  2. Step 2: Convert to fraction form
    15,507/21,399.66 = 8,792.76/x
  3. Step 3: Cross multiply
    15,507x = 21,399.66 × 8,792.76
  4. Step 4: Simplify right side
    15,507x = 188,162,074.46
  5. Step 5: Solve for x
    x = 188,162,074.46/15,507
  6. Step 6: Final answer
    x = 12,134.01

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.